Edit in JSFiddle

<div ng-app>
  <form name="form" novalidate>
    <input type="email" name="email" ng-model="email" required>
    <br/>
    <span ng-show="form.$submitted && form.email.$error.required">Please provide a email address</span>
    <span ng-show="form.$submitted && form.email.$error.email">Please provide a valid email address</span>
    <br/>
    <button type="submit">Submit</button>
  </form>
</div>